This is done in 'Quality of Service' (QoS) Maybe you could give an example of what you want to accomplish! Also, say whether you have more-than-one Astaro interface connected to local networks (that includes VLANs).
quota control setting (browsing time and total download)
It's possible, for example, to limit the availability of facebook to 11:30AM-to-12:30PM or to limit the bandwidth usage to 150Kb/second. It's not currently possible to do what you ask. You might want to vote for the following:
